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s. oscncowITz. OVERGASTING ATTACHMENT FOR SEWING MACHINES. No. 380,047. Patented. Mar.-27, 1888.

. v I I My V r Q9 my ap/ N. PETERS. Pholo'Lilhognphar. Washington D C.

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OVBRGASTING ATTACHMENT FOR SEWING- MACHINES. No. 380,047.

Patented Man-27, 1 33 I N. PUERS. Pholu-Lilhngrupher. Wa shington. nc.

UNITED STATES P TENT O FICE.

SOHAMU M. MOSOHOOWITZ, OF NEW YORK, N. Y., ASSIGN OR TO LOUIS MOSOHOOWITZ, OF SAME PLACE.

ODVERCASTING ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 380,047, dated March 27, 1888.

Application filed August 21, 1886. Serial No. 211,538. (lifodeL) To all whom it may concern: v

. Be it known that I, SOHAMU M. MOSGH- oowrrz, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented new and useful Improvements in Overcasting Attachments for Sewing-Machines, of which the following is a specification.

My. invention relates to automatic mechanism for effecting that kind of sewing commonly known as overcasting or oversewing, the stitches'being carried over the margin of one or more thicknesses of the fabric either for the purpose of securing orbinding raw edges, to unite the edges, or for the purpose of ornamentation.

It is the purpose of my invention to provide a comparatively simple attachment which may be easily and quickly applied to asewingmachine of any known pattern, and which shall carry a third, or,if the machine be a single-thread or chain-stitch machine, a second separate thread which is by the united action of the sewing mechanism and said attachment carried over the edge or edges of the fabric and inter-locked above and below alternately with the seaming thread or threads and'the seam is simultaneously sewed together with the overcasting or ove'rsewing, as herein described.

The invention consists in the several novel features of construction and combinations of parts hereinafter fully set forth, and definitely pointed out in the claims annexed to this specification.

Rcferringto the drawings forming part of this application,Figure1isa perspective viewshowing the attachment applied to asewing-machine 0f the Singer pattern. Figs. 1 to 1, inclusive, show the several positions of the sewing-machine needle and the thread carried'by it with relation to the overcasting-thread and the looper carrying said thread at, successive points in the movement of each. Fig. 2 is a side elevation of the attachment applied to the machine, the side plate of the attachment-casing being removed to exhibit the interior mechanism. Fig. 3 is a similar view showing the parts in a different position. Fig. 4 is aside elevation of actuating mechanism of the attachment removed from the casing, the view being taken from'the rear side in ,2. Fig.

5 is a plan view of the looper shown-in Figs. 1, 2, 3, and 4 detached. Fig. 6 is a detail perspective of the shield-plate detached. Fig. 7 is a dissected perspective showing the mechanism of the overcasting attachment removed. from its casing and separated, together with said casing, its cloth-plate, presser-foot, and thread-guide. Fig. 8 is-a perspective view upon an enlarged scale, showing the formation of seaming-stitch and the manner of interlocking the overcasting-thread therewith.

be applied and secured to the bed-plate l of the machine in position to co-operate with the needle and shuttle in the manner hereinafter set forth. Referring to Figs. 1, 2, and 7, the numeral 5 designates the bed-plate of the attachment casing, having a portion of its end cut away to form a broad opening, which has a longitudinal slot, 6, communicating with it. Crossing this opening and secured to the under side of the bed-plate is a plate, 7, having an opening, 8, for the feed-foot of the machine. 'Between the bed-plate and the plate 7 are formed channels 9, in which slides a throat plate, 10,

having an opening, 8 which registers with the similaropening, 8,in the plate 7, and provided with a hole, 11, for the passage-ofthe needle, a narrow slot, 12, being cut from the a purpose present-1y to'be described. Near the forward right-hand corner of the bed-plate is right-hand edge of the plate into the hole, for

an opening, 13, whichreceives the screw 14,

'by-which the throat-plate of the machine 'proper'is held in place when the attachment:

' Qroo" is not in use. t t.

Upon the bed-plate, near the front,is mount: ed a plate, 15, having an ear provided with an opening, 16, registering with a perforation in the bed-plate to receive a second attachingscrew, which may be the thumb-screw used for securing the gage or other parts to the sewing-machine. The end of the plate 15 is bent upward and has a perforation, 17, forming a guide for the thread carried by the overcasting device, as will be shown hereinafter.

Rising from the bed-plate 5 is a shell or casing, 18, within which are supported the essential portions of the mechanism comprised by myinvention. The special form and construction of this shell, as well as of the other portions of the bed-plate and casing, will be fully explained in connection with the several parts located upon or in the same.

In Fig. 7 of the drawings, in which the several parts are shown as separated from each other and removed from the casing, the numeral 19 designates the presser-foot, which is formed upon or attached to abar, 20, lying in a slot,21,between the outer face-plate, 18, of the casing and the post or block 22, forming part of an inner wall of metal, 18", upon which the forward end of the shell 18 is supported. The bar 20 extends to the rear end of the shell,and is there pivoted to the post 22 by means of a pivot-bolt entering an opening, 23, in the bar and tapped into the post or block 22.

Rising from the upper edge of the bar 20 is a bar, 24, which emerges through an opening, 25, in the upper part of the shell, and is provided with a pin, 26, rigid upon its projecting portion and engaging with a lift, 27,which is pivotally mounted upon the top of the shell 18 and provided with a cam, 28, by which the presser-foot is raised and lowered. N on mally this foot is thrown downward by a spring, 29, coiled upon a screw, 30, which passes through a slot, 31, formed in the rear part of the resser-foot, and is screwedinto the bed-plate, the lower end of the spring resting upon the foot and its upper end against a stud, which projects from the post 22 and receives the head of the screw. An opening, 32, is formed in the presser-foot, registering with the opening 11 in the throat-plate 10, the device being in these respects not substantially difi'erent from the presser-foot of the sewing-machine proper. It is slightly curved or convexed upon its under surface, which overlies the opening 8 in the throat-plate 10, and discharges the same functions as the ordinary presser-foot, which is removed from the machine when the attachment is used.

Journaled upon a bearing, 33, which receives support in the inner wall, 18, and at the other end in an opening, 34, in the outer or face plate, 35, is ashifting disk, 36, having a ratchet, 37, rigidly mounted upon its axis and lying against or near to the inner wall, 18". This ratchet is provided with six teeth and is moved by a pawl, 38, mounted upon an oscillating pawl-carrier, 39, a holding-pawl, 40, being pivoted on a stud, 40, projecting from the wall 18" and held by a spring, 41, in

engagement with the ratchet. The special construction and peculiar operation of these parts will be more fully shown hereinafter.

The pawl-carrier 39 consists of a metallic plate pivoted at its upper end upon a screw, 42. Upon its lower extremity is pivotally mounted the pawl 38, a lap-joint being formed between the parts in order to give flush surfaces on both sides. A spring, 43, dropping behind the rear edge of the pawl-carrier,bears upon the heel of the pawl and normally acts to lift its nose and throw it against the teeth of the ratchet.

Upon a pivot-bolt, 44, is mounted a bellcrank, 45, having one arm projecting through a slot, 46, in the shell 18. In the other arm of said lever, a little below the pivotal point 44, is inserted a stud, 47, having a male thread which engages with a female thread in the lever-arm, leaving the projecting end of the stud smooth. Upon this end is placed a friction collar or annulus, 48. When the parts are in place, the end of the stud carrying this collar lies in an angular slot, 49, cut in the body of the pawl-carrier. The construction of the parts which is shown in Figs. 2, 4, and 7 is such that when the projecting arm of the lever is thrown down and the pawl-carrier 39 swung backward in such manner as to retract the pawl and give it a new engagement with the ratchet 37 the stud 47 will lie in the upper portion of the slot 49, which is nearly at right angles with the path in which the stud moves when the lever is moved in the opposite direc tion. If, now, the arm 45 is raised, the stud will oscillate the pawl-carrier 39 until said stud passes the angle of the slot and enters the lower or horizontal portion, whereupon the movement of the pawl-carrier will cease, per mittiug the lever to move onward and discharge its additional functions. The swing of the pawl-carrier thus efi'ected is just sufficient to thrust the pawl far enough to rotate the ratchet a single tooth and turn the disk 36 onesixth of a revolution.

Projecting from the face of the disk 36 at equal intervals, near its periphery, are three studs, 50, each covered by a friction-sleeve, 51, which turns freely upon each stud, but is prevented from slipping off by upsetting the outer end of the stud.

Lying upon the bedplatawithin the shell 18, is a rectangular elongated shell or box, 52, open upon its upper side, and having a block, 53, set rigidly in its rear end. Within this shell, which is pivoted upon a pin, 54, entering a buttress, 18, of the inner wall, is placed a bar, 55, (shown in detail in Figs. 4 and 5,) having a slot, 56, in its rear end, which runs under the block 53. This slot receives the end of a pin, 57, which passes down through the block 53 and limits the longitudinal movement of the bar 55.

In the side of the bar, not far from its central point, is cut an opening, 58, which receives the end of the vertical arm of the bellcrank 45. Upon the upper surface of the bar are formed V-shaped notches 59, with which 7 a pawl, engages, said pawl being pivoted in a notch in the forward end of the block 53 and thrown downward by a spring, 61, attached to the block by the pin 57.

Rigidly attached to the outer plate of the shell 52, in such manner as to lie upon but not obstruct the longitudinal movement of the bar 55, is a narrow plate, 62, carrying an open hook or finger, 63,'having a beveled or inclined end, 64. WVhen the parts are in place and connected for operation, the studs 51 of the disk 36 lie partly within and partly without the opening inclosed by the finger 63. The entrance to this opening is bounded above and below by points or angles 65, the function of which will be explained hereinafter.

In the outer end of the bar 55 is formed a horizontal slot or opening, 66, in which is placed a looper-head, 67, pivoted on a pin, 68, and havinga finger, 69, whichextends into the slot in rear of the pivotal point. A spring, 70,

bears against the rearward or inner side of this finger and normally throws the outer point or the looper proper into the, position shown in Figs. 5 and 7, The devicelast named consists of a thin metallic plate, 71, tapered to a point, which is curved slightly toward the front. This looper is mounted upon the looper-head 67 by means ofa dovetail, 72, formed at right angles to the plate 71 and fitting in a notch in the end oft-he head. The looper is thus dropped a little below the lower surface of the bar 55, as shown in Figs. 2, 3, and 4.

In the rear edge of the looper is formed a groove or channel, '73, communicating at one end with a thread-opening, 74. This channel terminates at the point of the looper in an eye, 75. The thread-opening 74 is cut in the upper face of the plate 71, near its rear edge, and passes downward and rearward into the thread-groove 73, as shown in Figs. 4 and 5. The thread carried by the looper 71 is taken from aspool mounted upon an arm, 76, at the rear of the attachment, the spool being supported upon cone-bearings 77 and the tension being adjusted bya nut, 78, bearing upon a spring, 79, interposed between it and the outer cone. I

Upon the under surface of the bed-plate5 of the attachment is attached a thin plate, 80, (shown in detail in Fig. 6,) having an offset, 81, interposed between it and the bed-plate, a small stud, 82, being formed upon said offset near one end and adapted to engage with an opening in the bed-plate, whereby the plate 80 may be-rigidly attached by a single screw. The arrangement of these parts is such that when in place the plate 80 underlies the opening 6 of the bed plate, one of its ends being nearly flush with the inner edge of the feedfootopening 8 of the throat-plate 10, and in this outer edge of the plate 80, adjacent to that angle which is nearest to the throat 11,is formed a small notch, 83, the purpose of which will be explained in connection with the description of the operation of the parts. The spring 41, by which the holding-pawl 40 is thrown into engagement with itsratchet, is fastened by a screw,,41", passing through a coil of the spring, one end of which rests against the edge of the buttress 18, while the other end lies in a small recess in the heel of the pawl.

In mounting the.bell-crank 45 upon its pivot-pin 44 a collar, 44, is placed between the face of the lever and the outer face-plate, 35, to prevent lateral play. A leafspring, 84, is mounted upon the forward edge of the arm of thebell-crank 145 to deaden the noise as the lever strikes the forward shoulder of the notch 58 and to give a certain degree of elasticity in the contact between the parts upon the forward movement of the looper-bar 55.

In connecting the attachment with the machine the needle-clamp is first removed and replaced bya clamp, 85, which embraces the needle-bar 4 and holds the needle in place.

This clamp is held by a screw, 86, and upon its face is provided with studs 87, between which the arm 45 is placed. The throat-plate ofthe machine is removed and the attach ment, which is arranged under the needle-arm 2, as shown in Fig. 1, is moved up until the needle passes freely through thethroat-plate of the attachment, whereupon it is secured in position by the screw 14, which held the throatplate of the machine, and by a set-screw, 16,. passing through the opening 16 in the threadplate 15 and bedwplate 5. The parts being thus placed, the needle is threaded and the;

shuttle adjusted in the usual manner. A quantity of thread is then drawn off the spool carried by the arm 76, passed through the opening 17 in the end of the thread-guide 15, then through the thread-opening 74 in the looper, which brings it into the channel 73, and finally through the eye 75. The end of the thread is drawn out toward the operator a suitable length, and the three threads-4;. e., the upper and lower threads of, the machine and the over-casting-thread of the attachment-are carried to the left, the presser-foot is raised, and the apparatus is ready to receive the work. As the needle-bar 4 descends, it depresses the arm 45* of the bell-crank lever 45, and, the parts being in the position shown in Fig.4,

this movement not only retracts'the bar 55 within its shell 52, but also swings the p'awlcarrier 39 backward until the pawl .38 engages with the next-tooth of the ratchet 37, the stud 47 upon the lever 45 being at the same time carried up into the vertical portion of-the slot 49 in the pawl-carrier. As the needle-bar rises, the lever 45 first acts upon the pawl -carrier 39 by means of the stud 47, swinging it'just far enough before the stud passestheangle' of the slot 49 to cause the pawl 38 toturn the ratchet the distance ofasiugle tooth. During the ratchet gives to the disk 36 one-sixth of a revolution, during which one of the sleeved studs impinges upon the inclined end 64 of the finger 63. The inclination of this surface is such relatively to the circular movement of the stud that the shell 52 is raised, turning upon its pivot 54 until the stud passes under the upper angle 65, as shown in Fig. 2, and at this point the revolution of the disk is arrested, the stop-pawl 40 preventing backlash. The stud 47 having at this instant passed the angle of the slot 49, the lever-arm throws the bar 55 toward the needle into the position shown in dotted lines in Fig. 2, so that the point of the looper 71 passes just'beyond the path of the needle and close to it upon the shuttle side. The spring-pawl does not obstruct this outward thrust, as the form of the holding-notches 59 is such that the nose of the pawl is easily lifted by thelongitudinal movement of the bar, while at the same time a suflicient hold is given by the pawl to retain the bar in either its extended or retracted condition. As the needle-bar again descends,the looper is drawn back into position shown in full lines in Fig. 2, and the pawl 38 is retracted in the manner heretofore explained. Upon its following upward stroke the ratchet 37 is again rotated a single tooth, the stud 50 passes from beneath the upper angle of the hook 63, and the adjacent stud is thrown against the lower curve of the hook, thereby depressing the bar and bringing the stud by which it is thrown down directly over and resting upon the lower angle 65 of the book, as shown in Fig. 3. As the ratchet ceases its movement-,the lever 45 shoots the bar 55 forward, and the looper 71, which in the depressed position of the shell 52 lies in the opening 6 of the bed-plate directly over the plate 80, is thrown beneath the goods and underneath the throatplate 10 of the attachment. In this outward movement ofthe looper its point passes the shuttle side of the needle,

as shown in dotted lines in Fig. 3, in the same manner as when it is thrown out above the goods.

The movement of the ratchet 36, by which the looper is alternately raised and lowered, is not completely effected by the push-pawl 38. The nose of the holdingpawl 40 is beveled off in such a manner that as the said pawl is thrown back by the turning of the ratchet it will, by its pressure upon the impinging tooth, give an impulse to the forward movement of the ratchet, which will carry it quickly over the last portion of its fractional revolution and spring the pawl into place behind the tooth upon which it pressed.

By the mechanism described it will be seen that the looper 71 is shot outward and drawn back at each up-and-down stroke of the needle-bar, and by the rise and fall of the shell 52 is carried above and beneath the goods alternately.

I will now describe the manner in' whic the overcastingstitch is formed. 7

Referring to Figs. 1 to 1', inclusive, and to Fig. 8, I have designated the upper and lower threads by the letters t and t, respectively, and the overcasting-thread by the letter t. The seaming-threads carried by the needle and the shuttle make the stitch in the usual manner. 7 The work being introduced and arranged to take a seam at a suitable distance from the edge, the presser-foot 19 is lowered and the machine started. As the needle rises to its highest point, the looper 71 is thrown out and its curved point passes beneath the point of the needle, as represented in Fig. 1*, catches the needle-thread t upon its convex edge, and moves forward until it reaches the position shown in Fig. 1"; At this moment the needle descends, its point passing between the concave edge of the looper and the overcastingthread i as seen in Fig. 1. As the needle passes down through the fabric, the looper is retracted, throwing off the loop of the needlethread t which was drawn over it, as seen in Fig. 1, and leaving said loop around the overcasting'thread t as in Fig. 1. The needle now rises, its loop having been caught by the shuttle-thread, and, the work being fed forward, the overcasting-thread is crossed upon itself, forming an eye, e, as in Fig. 1, and as the needle again descends to form the ensuing stitch the thread t is carried over the opposite side of the eye, as seen in Figs. 1' and 1'. As the needle passes down through the work in the manner described, the looper, which has been retracted, is dropped by the turn of the disk 36 and lies in the opening 6 in the bed-plate. As the needle rises above the position shown in Fig. 1", the looper is thrown forward beneath the work, as in Fig. 1, and there occupies the same position relatively to the needle as when it is above the work. Upon the ensuing descent of the needle, however, the thread t is not looped over the convex edge of the looper, asin Fig. 1, but, being carried down between the concaved edge thereof and the looper-thread t and caught by the shuttle-thread t,the retraction of the looper carries the overcasting-thread around the loop of the shuttle-thread, which is drawn up into the fabric by the tension of the upper thread, and the feed of the work crosses the overcasting-thread upon itself, forming an eye, 0, upon the wrong side of the work. In this manner the overcasting-thread is carried over and over the edge of the work and looped around the upper or needle thread above and the shuttle-thread below alternately. As shown in Figs. 1 1', and 8, the overcast will appear upon each side of the work connected with the alternate stitches. oiling-apertures 88 are formed in the shell 18 and face-plate 35 at suitable points.

It will be noticed that the notch 83 in the plate lies in the path of the shuttle-thread as the shuttle is reciprocated beneath the throat-plate. The function of this notch is to catch and hold the thread of the shuttle in the same manner that it is held by the throat of the machine, in order that its loop maybe drawn fairly up into the material.

At the same time it is necessary that the throat-plate vbe cut through from the needle-hole 11 toward the attachment to allow the looper to carry its thread over the edge of the goods. A narrow slot, 12, is formed in the throat-plate for this purpose and a similar opening is made in the presser-foot 19. The looper 71 is pivoted in the end of the looper-bar 55 and held in posi- 'tion by the spring 70, in order to permit the looper to be retracted after the needle has.

It is obvious that the precise construction of parts herein described can be varied without departing from the principle of my invention, which contemplates the production of a seam that is sewed simultaneously with an overcasting-stitch which is interlocked above and below alternately with the seaming thread or threads.

Having thus described my invention, what I claim is- I 1. The combination, with the sewing mechanism of an ordinary sewing-machine, of an overcasting attachment employing a separate thread and operated by a lever moved by the reciprocation of the needle-bar, a looper carry; ing the overcasting-thread, a support within which the looper-bar has longitudinal movement, a rotating disk having studs connected with said support, and means to rotate the disk, whereby the support and looper-bar are raised and lowered alternately, substantially as described.

2. In an overcasting attachment for sewingrying the separate overcasting-thread, of a support pivoted at one end, within which a bar carrying said looper has longitudinal movement, an open hook or curved finger mounted upon said support, a disk having studs which engage with the hook, and means forgiving to said disk a fractional revolution at intervals, whereby the looper is alternately raised above and lowered below the bed-plate, substantially as described.

3. In an overcasting attachment for sewingmachines, the combination, with a pivoted support carrying the looper-bar, of a curved finger mounted on said support, a disk having studs engaging with the finger, a ratchet rigid upon the axis of the disk, a pawl-carrier having an angular slot and carrying a pawl by which said ratchet is given a fractional revolution,andabell-crank leverhavingastudmoving in the angular slot of the pawl-carrier and engaging witha notch in the looper bar, whereby the pivoted support is alternately raised and lowered and the looper-bar shot forward and retracted after each of said movements, substantially as described.

4. In an overcasting attachment for sewingmachines, the combination, with the sewing I mechanism, of a support pivotally mounted at 'oue end,a looper-bar having an open hook and rising and falling with said supportfand having longitudinal motion therein,-adisk having stgds revolving in said openhook, a bell-crank lever vibrated by the needle-arm to give longitudinal movement to the looperbar, and a swinging pawl-carrier conne'ctedto said bell-crank by a stud on the latter playing in an angular slot in the former, the said open hook having a beveled or inclined end, substantially as described. is Y 5. In an overcasting attachment for sewingmachines, the combination, with the sewing mechanism, a looper carrying a separate overcasting-thread, a lever operated by the needlebar of the machine, a push-pawl and a'looperbar, both reciprocated by said lever,and a disk rotated by said push-pawl and having studs which at each fractional revolution of the disk raise and lower the looper-bar alternately prior .dle-bar of the machine, of a pawl-carrier having an angular slot, a stud carried by the bellcrank and lying in said slot, and a looper-bar having a longitudinal opening intermediate its ends, in which the lower end of the actuatingarm of the bell-crank lies, said opening being of a length sufficient to permitlimitd-movement of the end of the lever before actuating IOC thelooper-bar, whereby the movement'o'f the pawl-carrier is effected before the thrust of the looper-bar takes place, substantially as described.

' 7. The combination, in an overcasting attachment for sewing-machines, of alooper-bar carrying a looper, means for reciprocating the looper-bar, a swinging support carrying said bar and provided with a curved finger having an inclined end'and upper and lower angles, a disk having studs for engaging said finger, and

means for rotating the disk and causing the studs to alternately raise and lower the support, substantially as described.

8. In an overcasting attachment for sewingmachines, the combination, with the sewing mechanism, of a looper carrying a separate thread and consisting of a plate having a channeled edge, a thread-opening leading into said its channel and an eye in its curved end, a-bar carrying the looper, and a'bell-crank lever having one arm engaged with the needle-bar and the other with the looper-bar, wherebythe looper is shot outward at each upward stroke and drawn inward as the needle-bar descends, substantially as described.

9. -In an overcasting attachment for sewingmachines, the combination, with the sewing mechanism, of a looper carrying a'sep'arate thread and consisting of a channeled plate having an eye in its curved end, a bar carrying the looper, a bell-crank lever having one arm engaged with the needle-bar and the other lying in a notch in the looper-bar, and lifting mechanism by which said bar is alternately raised and lowered, substantially as described.

10. The combination, in an overcasting attachment for sewing-machines, of a throatplate and presser-foot forming part of said at tachment and each having a needle-hole and a slot extending therefrom to its inner edge, with a looper for carrying the overcastingthread, means for reciprocating the looper alternately above and below the Work, said looper having means for carrying the over casting-thread over the edges of the work and interlocking it above and below the work with the sewing-machine thread or threads, and a stitch-forming mechanism by which the interlocking sewing -machine stitches are made, substantially as described.

11. In an overcasting attachment for sewingmachines, the combination, with a slotted throat-plate, of a plate attached to the under surface of the bed-plate of the attachment and having a thread-notch which lies adjacent to the slot in the thread-plate, substantially as described.

, 12. In an overcasting attachment for sewingmachines, the combination, with the sewing mechanism, of a shell pivoted at one end and having a curved finger or open hook rigidly mounted thereon, a disk having studs which engage with said finger, a pawl engaging with a ratchet upon the axis of the disk, a pawlcarrier moved by the actuating-lever of the attachment, a looper-bar moving longitudinally in the shell and connected with the end of the actuating-lever, and a spring-pawl engaging with notches in the looper-bar, substantially as described.

13. In an overcasting attachment for sewingmachines, the combination, with the reciprocating looper and the pivoted casing or shell within which it moves, ofa disk having studs which engage with a curved finger or open hook upon the shell, a ratchet by which the disk is turned, and aspring-actuated holdingpawl having its end beveled or inclined upon the edge adjacent to the ratchet, substantially as described.

14.. The combination, with an' overcasting attachment for sew'ingmachines, having a casing, 18, of a pivoted bar, 20, carryinga presser 'one end, within which the looper-bar is arranged, a lever connected with said bar and to the needle-bar of the sewing-machine, and mechanism for raising and lowering the shell, said mechanism being actuated by the lever reciprocating the needle-bar, substantially as described.

16. The combination,with the pivoted shell 52, having the curved finger 63, provided with the inclined end 64 and angles 65, of the disk 36, having sleeved studs 50, and means for giving a fractional rotation to said disk, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

SOHAMU M. MOSCHCOYVITZ.

WVitnesses:

IKE FREEMAN, HENRY Hans. 

